Lock



Amin 8 1924.

W. C. SHINN LOCK Filed April 24 1922 Patented Api'. S, i924.

WILLIAM C. SHINN, O F CHICAGO, ILLINOIS,YASSIGNOR T0 CHICAGO CABINETLOCK COL, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

LOCK.

Application led April 24, 1922. -Serial No. 556,256.

The object of the invention is tol provide.

improved means for pressing some at least of the tumblers into operativeposition to render the lock more eHicient.

The invention consists in the several novel features hereinafter setforth and more particularly defined by claims at the conclusion hereof.

In the drawings: Fig. 1 is a section of a lock embodying the invent-ion,the tumblers and the spring for shifting them being shown in elevation.Fig. 2 is a horizontal section. Fig. 3 vis a section on line 3 3 of Fig.2. Fig. 4 is a detail perspective of the spring.

A casing 9 is adapted to rotatably hold a cylinder or carrier 8 whichmay be connected to operate a lock in any suitable or well {nown manner.

The carrier` is provided with a slot 10 in which a series of platetumblers 11 are mounted so they may slide transversely to Ibring theirends into the usual locking slot in the casing, as Well understood inthe art.

Each tumbler is formed with a. key slot 12 and with lugs or terminals 15adapted to enter one of the locking slots in the casing 9 to lock thecylinder, and .when held in correct position by the key 13 to clear thecasing and release the carrier for rotation.

Notches 16 are formed in one of the side margins of the plate tumblers11 andthe shoulders 17 at the ends of the slots are adapted to beengaged by a spring for normally pressing the tumbler into operativeposition. The improved spring for performing this function is formed ofsuitable wire and comprises coils 18 and 19 which have their outerterminals integrally connected, as at 20, and their inner terminalsextended toform oppositely extending arms 21 and 22 to press thetumblers engaged thereby in opposite directions. For example, arm 21will exert pressure upon the upper ends of the tumblers near the frontof the carrier and press them upwardly while the arm 22 will engage anumber of the tumblers adjacent the back of the carrier and press themdownwardly. W hen a key of the proper shape 1s inserted, it. willoperate the tumblers gainst the force of the spring-arms 21 and` Theinvention exemplifies a plate tumbler lock with means by which a singlespring serves to operate different tumblers'in opposite directions torender the lock efficient 1n use.

The invention is not to be understood as restricted to the details setforth, since these may be modiedl within the scope of the appendedclaims, Without departing from the spirit and scope of the invention.

Having thus described the invention, what I claim as new and desire tosecure by Letters Patent, is:

1. In a cylinder lock, the combination of a rotatable carrier, platetumblers slidable transversely in the carrier, and having, one sidenotched to form opposing shoulders, and a spring comprising a helicalcoil adjacent the notched side and longitudinal arms extending inopposite directions from the coil to engage different tumblers and pressthem in opposite directions.

2. In a cylinder lock, the combination of a rotatable carrier. platetumblers slidable transversely in the carrier and having one sidenotched tp form opposing shoulders, and a spring comprising a pluralityof helical coils adjacent the notched side of the tumblers and armsextending longitudinally in opposite directions to engage the shouldersof different tumblers and press them in opposite directions.

3. In a cylinder lock, the combination of a rotatable carrier having apocket in one side thereof. plate tumblers slidable transversely in thecarrier and provided with shoulders at one side, and a spring adjacentone side of the tumblers, provided with means for pressing some of thetumblers outwardly and comprising a coil held in said pocket.

4. In a cylinder lock, the combination of a rotatable carrier having apocket in one of its sides, plate tumblers slidable transversely in thecarrier and provided with shoulders at one side, and a spring adjacentone side of the tumblers, extending longitudinally of the carrier,provided with means engaging the shoulders for pressing some of thetumblers outwardly, and comprising a. plurality of coilsheld in saidpocket.

5. In a cylinder lock, the combination of -a rota-table carrier having apocket in one of its sides; plate tumbleis slidaible transversel `in thecarrier and provided with shoul ers at one side, and a spring adjacentextending longitudinally 0i the ozu'i'ier andv engaging shoqllders ondifferent tumblers to press them outwardly in opposite direotions.

Signed at; Chicago, Illinois, this 5th day of April, 1922. l WILLIAM C.SHINN.

